玄武岩纤维几何参数对SMA-5薄层罩面性能影响

In order to analyze the influences of the geometric parameters (diameter and length) of basalt fiber (BF) on the performance of thin overlayer asphalt mixture, the laws were explored by methods of indoor experiments. The performance test of thin overlayer mixture was carried out by rutting test, uniaxial penetration test, low temperature trabecular bending test, IDEAL-CT test, freeze-thaw spliting test, four-point bending fatigue test, Kentucky Castle fly-away test and pendulum anti-slip test, rspectively. The results show that the influences of basalt fiber geometric parameters on different performance of thin overlayer mixture are remarkably different. In more detail, the fiber with long length and small diameter has excellent effect on the high temperature performance and stripping resistance of the mixture; the fiber with short length and large diameter has excellent effect on the low temperature crack resistance of the mixture; the fiber with long length and large diameter has excellent effect on the medium crack resistance and fatigue performance of the mixture; the fiber geometric parameters have no significant impact on the water stability performance and skid resistance of the mixture. Based on the TOPSIS algorithm, the evaluation model was established, for the selected basalt fibers with different geometric parameters , the evaluation scores decrease in the order BF 6-16＞BF 6-7＞BF 6-25＞BF 3-7＞BF 3-16.